Countersunk
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Sumaku za Kukabiliana na Sumaku
Jina la Bidhaa: Sumaku ya Neodymium yenye Shimo la Countersunk/Countersink
Nyenzo: Sumaku Adimu za Dunia/NdFeB/ Neodymium Iron Boroni
Dimension: Kawaida au umeboreshwa
Mipako: Fedha, Dhahabu, Zinki, Nickel, Ni-Cu-Ni.Shaba nk.
Umbo: Imebinafsishwa
